公开(公告)号：US20210307603A1

公开(公告)日：2021-10-07

申请号：US17165001

申请日：2021-02-02

申请人： Juejun Hu ,  Tian GU ,  Derek Kita ,  Carlos Andres Rios Ocampo

发明人： Juejun Hu ,  Tian GU ,  Derek Kita ,  Carlos Andres Rios Ocampo

IPC分类号： A61B3/10 ,  G01B9/02 ,  G02B27/10

摘要： An optical coherence tomography (OCT) engine includes a digital Fourier-Transform (dFT) spectrometer, a tunable delay line, and a high-speed optical phased array (OPA) scanner integrated onto a single chip. The broadband dFT spectrometer offers superior signal-to-noise ratio (SNR) and fine axial resolution; the tunable delay line ensures large imaging depth by circumventing sensitivity roll-off; and the OPA can scan the beams at GHz rates without moving parts. Unlike conventional spectrometers, the dFT spectrometer employs an optical switch network to retrieve spectral information in an exponentially scaling fashion—its performance doubles with every new optical switch added to the network. Moreover, it also benefits from the Fellgett's advantage, which provide a significant SNR edge over conventional spectrometers. The tunable delay line balances the path length difference between the reference and sample arms, avoiding any need to sample high-frequency spectral fringes.

公开(公告)号：US20200225401A1

公开(公告)日：2020-07-16

申请号：US16685201

申请日：2019-11-15

申请人： Shaoliang YU ,  Haijie ZUO ,  Juejun Hu ,  Tian GU

发明人： Shaoliang YU ,  Haijie ZUO ,  Juejun Hu ,  Tian GU

IPC分类号： F21V8/00 ,  G02B6/12

摘要： Reflecting light beams off of microscale three-dimensional (3D) freeform surfaces can yield highly efficient coupling into and out of optical waveguides, optical fibers, and photonic chips. The structure of the 3D freeform reflective surface determines the shape of the reflected beam. This allows freeform reflectors to control the mode profile, rotation angle, and divergence angle of light beams. Control of beam shape enables mode matching between source output mode and target input mode, which results in low-loss optical coupling. An inventive freeform reflective surface can direct light beams in plane or out of plane via specular reflection or total internal reflection. A photonic integrated circuit with this type of freeform optical coupler can operate with a bandwidth range of at least 400 nm, potentially encompassing all visible or telecommunications wavelengths, and can be volume manufactured in photonic chips.

公开(公告)号：US20170352771A1

公开(公告)日：2017-12-07

申请号：US15666219

申请日：2017-08-01

申请人： Tian GU ,  Juejun HU

发明人： Tian GU ,  Juejun HU

IPC分类号： H01L31/054 ,  H01L31/0687 ,  H01L31/18

CPC分类号： H01L31/0543 ,  G02B3/0056 ,  G02B19/0014 ,  G02B19/0076 ,  H01L31/042 ,  H01L31/0547 ,  H01L31/0687 ,  H01L31/1804 ,  Y02E10/52

摘要： A photovoltaic (PV) apparatus includes a substrate having a first substrate surface and a second substrate surface. A cavity fabricated in the substrate extends from the first substrate surface toward the second substrate surface. The cavity defines a first end to receive incident light, a second end opposite the first end, and a side surface, which extends from the first end to the second end to concentrate the incident light, received by the first end, toward the second end. The PV apparatus also includes a photovoltaic (PV) cell, in optical communication with the second end of the at least one cavity, to convert the incident light into electricity.

公开(公告)号：US20120114281A1

公开(公告)日：2012-05-10

申请号：US13318920

申请日：2010-05-04

申请人： Tian Gu ,  Michael W. Haney ,  Rohit Nair

发明人： Tian Gu ,  Michael W. Haney ,  Rohit Nair

IPC分类号： G02B6/12 ,  G02B6/26

CPC分类号： G02B6/43 ,  G02B6/4214

摘要： Optical interconnect systems and methods are disclosed. An optical interconnect system includes a substrate, a first waveguide, and a free-space coupling structure. The first waveguide is disposed on the substrate. The free-space coupling structure is adjacent the first waveguide. The free-space coupling structure redirects light propagating through the first waveguide in a first direction out of the first waveguide in a second direction different from the first direction. An optical interconnect method comprises transmitting light through a first waveguide in a first direction; and redirecting the light out of the first waveguide in a second direction different from the first direction with a free-space coupling structure disposed in the first waveguide.

摘要翻译： 公开了光互连系统和方法。 光学互连系统包括基板，第一波导和自由空间耦合结构。 第一波导设置在基板上。 自由空间耦合结构与第一波导相邻。 自由空间耦合结构在第一方向上沿着与第一方向不同的第二方向将从第一波导传播的光重定向到第一波导外。 光学互连方法包括沿第一方向透过第一波导的光; 并且在与第一方向不同的第二方向上将光从第一波导重新导向，并且设置在第一波导中的自由空间耦合结构。

公开(公告)号：US20050130402A1

公开(公告)日：2005-06-16

申请号：US11045202

申请日：2005-01-27

申请人： Yelehanka Ramachandramurthy Pradeep ,  Tong Chen ,  Zhi Han ,  Zhen Zheng ,  Kelvin Ong ,  Tian Gu ,  Syn Cheah

发明人： Yelehanka Ramachandramurthy Pradeep ,  Tong Chen ,  Zhi Han ,  Zhen Zheng ,  Kelvin Ong ,  Tian Gu ,  Syn Cheah

IPC分类号： H01L21/336 ,  H01L21/60 ,  H01L21/768 ,  H01L21/8234 ,  H01L21/4763 ,  H01L23/48 ,  H01L23/52 ,  H01L29/40

CPC分类号： H01L21/76897 ,  H01L21/76895 ,  H01L21/823468 ,  H01L21/823475 ,  H01L29/6656

摘要： An integrated circuit is provided. A gate dielectric and a gate are provided respectively on and over a semiconductor substrate. A junction is formed adjacent the gate dielectric and a shaped spacer is formed around the gate. A spacer is formed under the shaped spacer and a liner is formed under the spacer. A first dielectric layer is formed over the semiconductor substrate, the shaped spacer, the spacer, the liner, and the gate. A second dielectric layer is formed over the first dielectric layer. A local interconnect opening is formed in the second dielectric layer down to the first dielectric layer. The local interconnect opening in the first dielectric layer is opened to expose the junction in the semiconductor substrate and the first gate. The local interconnect openings in the first and second dielectric layers are filled with a conductive material.

摘要翻译： 提供集成电路。 分别在半导体衬底上和上方提供栅极电介质和栅极。 在栅极电介质附近形成接合部，并且在栅极周围形成成形间隔物。 间隔件形成在成形间隔件下方，衬垫形成在间隔件下方。 第一电介质层形成在半导体衬底，成形间隔物，间隔物，衬垫和栅极上。 在第一电介质层上形成第二电介质层。 局部互连开口形成在第二电介质层中，直到第一电介质层。 打开第一介电层中的局部互连开口以暴露半导体衬底和第一栅极中的结。 第一和第二介电层中的局部互连开口用导电材料填充。

公开(公告)号：US10718668B2

公开(公告)日：2020-07-21

申请号：US16058927

申请日：2018-08-08

申请人： Tian Gu ,  Derek Matthew Kita ,  Juejun Hu

发明人： Tian Gu ,  Derek Matthew Kita ,  Juejun Hu

IPC分类号： G01J3/44 ,  G01J3/453 ,  G01J3/02 ,  G01N21/65

摘要： State-of-the-art portable Raman spectrometers use discrete free-space optical components that must be aligned well and that don't tolerate vibrations well. Conversely, the inventive spectrometers are made with monolithic photonic integration to fabricate some or all optical components on one or more planar substrates. Photonic integration enables dense integration of components, eliminates manual alignment and individual component assembly, and yields superior mechanical stability and resistance to shock or vibration. These features make inventive spectrometers especially suitable for use in high-performance portable or wearable sensors. They also yield significant performance advantages, including a large (e.g., 10,000-fold) increase in Raman scattering efficiency resulting from on-chip interaction of the tightly localized optical mode and the analyte and a large enhancement in spectral resolution and sensitivity resulting from the integration of an on-chip Fourier-transform spectrometer.

公开(公告)号：US20190049300A1

公开(公告)日：2019-02-14

申请号：US16058927

申请日：2018-08-08

申请人： Tian GU ,  Derek Matthew KITA ,  Juejun HU

发明人： Tian GU ,  Derek Matthew KITA ,  Juejun HU

IPC分类号： G01J3/44 ,  G01N21/65 ,  G01J3/453

CPC分类号： G01J3/44 ,  G01J3/0218 ,  G01J3/0259 ,  G01J3/0272 ,  G01J3/453 ,  G01J3/4532 ,  G01N21/65

摘要： State-of-the-art portable Raman spectrometers use discrete free-space optical components that must be aligned well and that don't tolerate vibrations well. Conversely, the inventive spectrometers are made with monolithic photonic integration to fabricate some or all optical components on one or more planar substrates. Photonic integration enables dense integration of components, eliminates manual alignment and individual component assembly, and yields superior mechanical stability and resistance to shock or vibration. These features make inventive spectrometers especially suitable for use in high-performance portable or wearable sensors. They also yield significant performance advantages, including a large (e.g., 10,000-fold) increase in Raman scattering efficiency resulting from on-chip interaction of the tightly localized optical mode and the analyte and a large enhancement in spectral resolution and sensitivity resulting from the integration of an on-chip Fourier-transform spectrometer.

公开(公告)号：US20170227399A1

公开(公告)日：2017-08-10

申请号：US15429321

申请日：2017-02-10

申请人： Juejun Hu ,  Tian Gu ,  Hongtao Lin ,  Derek Matthew Kita ,  Anuradha M. Agarwal

发明人： Juejun Hu ,  Tian Gu ,  Hongtao Lin ,  Derek Matthew Kita ,  Anuradha M. Agarwal

IPC分类号： G01J3/453 ,  G02F1/313 ,  G01J3/02

CPC分类号： G01J3/4531 ,  G01J3/0218 ,  G02F1/313 ,  G02F1/3136 ,  G02F2001/311

摘要： A spectrometer includes an interferometer having a first interference arm and a second interference arm to produce interference patterns from incident light. At least one of the interference arms includes a series of cascaded optical switches connected by two (or more) waveguides of different lengths. Each optical switch directs the incident light into one waveguide or another, thereby changing the optical path length difference between the first interference arm and the second interference arm. This approach can be extended to multi-mode incident light by placing parallel interferometers together, each of which performs spectroscopy of one single mode in the multi-mode incident light. To maintain the compactness of the spectrometer, adjacent interferometers can share one interference arm.

公开(公告)号：US20120106890A1

公开(公告)日：2012-05-03

申请号：US13318917

申请日：2010-05-04

申请人： Tian Gu ,  Michael W. Haney ,  Rohit Nair

发明人： Tian Gu ,  Michael W. Haney ,  Rohit Nair

IPC分类号： G02B6/12

CPC分类号： G02B6/43 ,  G02B6/4214

摘要： Systems and methods for modulator-based optical interconnections are disclosed. An optical interconnect system comprises a substrate, a wave path, a coupling structure, and a modulator. The wave path may be a waveguide disposed on the substrate. The coupling structure is coupled to the substrate and disposed within the wave path. The modulator is positioned between the substrate and the coupling structure. An optical interconnect method comprises the steps of transmitting light through a wave path, redirecting the light onto a modulator with a coupling structure, modulating the light from the coupling structure with the modulator; and redirecting modulated light from the modulator into the wave path with the coupling structure.

摘要翻译： 公开了用于基于调制器的光互连的系统和方法。 光学互连系统包括衬底，波通路，耦合结构和调制器。 波道可以是设置在基板上的波导。 耦合结构耦合到衬底并且设置在波道内。 调制器位于基板和耦合结构之间。 光学互连方法包括以下步骤：通过波道传输光，将光重定向到具有耦合结构的调制器上，用调制器调制来自耦合结构的光; 并且将来自调制器的调制光重定向到具有耦合结构的波道中。

公开(公告)号：US20110297229A1

公开(公告)日：2011-12-08

申请号：US13151614

申请日：2011-06-02

申请人： Tian Gu ,  Michael W. Haney

发明人： Tian Gu ,  Michael W. Haney

IPC分类号： H01L31/18 ,  G02B6/32 ,  G02B6/10 ,  G02B6/26

CPC分类号： G02B6/4298 ,  G02B6/32 ,  G02B6/34 ,  G02B6/4214 ,  H01L31/0543 ,  H01L31/0547 ,  Y02E10/52

摘要： Optical sheets, light collection and conversion systems and methods of forming optical sheets are provided. An optical sheet includes a light guide layer having at least one light guide and a light concentrator layer adjacent to the light guide layer for concentrating incident light. Each light guide has a substantially uniform thickness with respect to a propagation direction of light through the light guide and includes a plurality of input-coupling elements and at least one output-coupling element. The light concentrator layer includes a plurality of concentrator elements optically coupled to the plurality of input-coupling elements of the respective light guide. Each light guide is configured to combine the concentrated light from the respective plurality of concentrator elements and to guide the combined light to the at least one output-coupling element.

摘要翻译： 提供了光学片，光收集和转换系统以及形成光学片的方法。 光学片包括具有至少一个光导的导光层和与用于聚集入射光的导光层相邻的聚光器层。 每个光导相对于通过光导的光的传播方向具有基本均匀的厚度，并且包括多个输入耦合元件和至少一个输出耦合元件。 光聚集层包括光学耦合到相应光导的多个输入耦合元件的多个聚光元件。 每个光导被配置为组合来自相应的多个聚光器元件的集中光并且将组合的光引导到至少一个输出耦合元件。